Study On A Light Truck Cabin Crashworthiness Simulation

This subject comes from a light truck R＆D project of a domestic professional automotive design company.The main objective of this thesis is to analyze.evaluate the cabin impact performance according to ECE R29 regulations,and then optimize the structural design to improve its impact safety performance.The research method is computer crash simulation analysis based on nonlinear finite element theory,and the explicit nonlinear fnite element software LS-DYNA is used.In this thesis,research results and conclusions are as follows:(1)Based on widely referring to the information,fully absorbing the previous experiences,as well as effectively using the existing conditions,the crash finite element model is established,including the cabin,front and rear mounting assembly,chassis frame,steering mechanism,the instrument panel frame and so on.(2)Front pendulum crash analysis results show that the remained surviving space of the research cabin meets the regulatory requirements.but the tilting assembly is subject to the tremendous impact of the pendulum.Some improvement suggestions are hence presented to ensure the reliability of its connection with the chassis frame in the real vehicle test.(3)Roof and rear crush analysis results show that the remained surviving space meets the regulatory requirements,and the deformation mainly occurs in the roof and rear panel.So some improvement measures are put forward to reduce weight in view of effectively using the overall stiffness of the structure.Through the research of this thesis,an effective way to evaluate the light truck,impact performance is summed up,which is based on the nonlinear finite element theory,and using LS-DYNA software. This thesis provides a new analysis concept,analysis methods and analytical tools for the light truck research and development.